Maybe but I reckon there are plenty of punters out there that turn up with fizz/choccies/flowers/jewellery/shoes/lingerie/dresses etc. etc. Some treat it like a date......
Given that some punters receive zero interest from wives/significant others in the sex department, it's probably a fair bet that they also have zilch opportunity to express a "romantic" streak, so why shouldn't they treat it like a date - it might be the only chance they get.
Some people, especially at this time of year, will give Xmas presents to other "service" providers, be it bin men, the postie, hairdressers, etc. Can't see the problem - it's their money, let them do what they want with it